The first and most obvious is that Woz is hurt from all those hours of dance practice. The second, and most plausible, is that Woz has installed some sort of bionic technology to improve his foot speed. The third is that he's had another right foot installed, for added coordination. All organic.

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He's walking on it, so its not broken. Maybe its tendon damage or something. Dunno!

Woz, what happened, man? Are you ok? TALK TO US!

UPDATE: ABC confirms that Cedars-Sinai hospital in Los Angeles xrayed and found a fracture. BUT he'll be able to continue on the show.